Adjustable range spring for differential pressure responsive...

Details Adjustable range spring for differential pressure responsive... Adjustable range spring for differential pressure responsive...

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F16F 3/07 (2006.01) F16F 1/00 (2006.01) G01L 9/04 (2006.01) G01L 13/02 (2006.01)

Patent

CA 1293006

ADJUSTABLE RANGE SPRING FOR DIFFERENTIAL PRESSURE RESPONSIVE DEVICES . ABSTRACT OF THE DISCLOSURE A range spring assembly for a differential pressure responsive device which includes a spring retainer plate configured for coaction with a movable portion of a device, such as a bellows or diaphragm. A flat spiral spring in spaced relation to the retainer plate is provided with a clamp disc. A plurality of helical range springs are equi- angularly disposed about a circumference inwardly of the periphery of the retainer plate, each of the range springs having a first end thereof securely attached to the retainer plate adjacent the center thereof, with the other ends being selectively attachable to the clamp disc, whereby the range may be readily established by locking one or more ends of the helical springs for providing the desired spring bias for the selected range.

556498

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